Reduction of Titania-Ferrous Ore by Carbon Monoxide

• DOI: 10.2355/isijinternational.43.1316
• Publication Date: 2008-01-16T13:30:20Z
• Authors: Eungyeul Park; Oleg Ostrovski
• Keywords: 0211 other engineering and technologies; 02 engineering and technology

The reduction of titania-ferrous ore (ironsand) containing 57.2 wt% of iron and 7-8wt% of TO 2 was investigated in non-isothermal and isothermal reduction experiments using CO-CO 2 -Ar gas mixtures in a laboratory fixed bed reactor. Samples in the course of reduction were characterised using XRD, EPMA and SEM. Two types of particles were identified in ironsand: 1) homogeneous particles of titano-magnetite with cubic spinel structure (a major type); and 2) non-homogeneous particles, characterised by lamellar structure of rhombohedral titano-hematite, exsoluted from the titano-magnetite. Titano-magnetite, which is a magnetite-ulvospinel solid solution (Fe 3 O 3 ) 1-x (Fe 2 TiO 4 ) x , with x=0.27±0.02, was reduced to metallic iron and titanium sub-oxides. Titanium had a strong effect on the mechanism and rate of reduction of iron oxide in ironsand.